Breech-loading fire-arm



(No Model.)

N. R. DAVIS, BREEGH LOADING FIRE ARM.

j Patented Peb. 19. 1884.

N. PEIERS. Pholcrhlhogr-lpher. Washington. D. C.

UNITED STATES PATENT OFFICE.

NATHAN RUSSELL DAVIS, OF FREETOWN, MASSACHUSETTS.

BREECH-LOADING FIRE-ARM.

SPECIFICA'IIOQAT- forming part of Letters Patent No. 293,719, dated February 19,1884,

Application filed December 11, 1883. (No model.)

invented a new and useful Improvement in Breech-Loading Fire-Arms; and I do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which Figure 1 denotes atop view Fig. 2, aside elevation; Fig. 3, a bottom view; Fig. 4, a longitudinal section of the barrels and stationary breech and their connections of a double-barreled breeclrloading gun. Fig. 5 is a horizontal section taken through the pivot of the connected barrels. Fig. 6 is a top view of such pivot. Fig. 7 is a top view of the stationary breech and the pivot-supporting arms extending therefrom, parallel to each other, and a distance apart equal to the width of the pivotal and locking projection of the barrels.

My improvement relates to the construction and adaptation of the pivot of the barrels relatively to its supporting-arms. It is exceedingly important to have the said pivot very firmly connected with its supportingarms, as the pivot has to sustain the barrels against the expansive force of the powdercharge or cartridge of either of the barrels While being discharged.

Prior to my present improvement it has been customary with me to make the pivot as a short cylinder of a length equal to the distance between the supportingarms, and to insert it between them and hold it in place by a headed screw going through it axially and through one of the arms and screwed into the other, it having projected from it the cartridge-retractor operative cam. Under such a construction and adaptation of the pivot to its sustaining-arms its holding bolt or screw becomes liable to be broken or out off under the explosive force of a charge.

In the drawings, A denotes the stationary breech, B B, the two connected barrels, and 0 their pivotal and locking projection. This projection has in its front end a semicircular notch, a, to receive and bear against the tubular pivot D, and there is in such projection, at its rear end, a bolt-receiving notch, Z). From the stationary breech there are extended, parallel to each other and at a suitable distance apart to receive the projection Cbetween them, two straight arms, E E, each of which has formed within it, from its inner face and near its outer end, a cylindrical or polygonal recess, c, to receive a corresponding]y-shaped projection, d, extending from the next adj acent end of the tubular cylindrical pivot D. This recess I usually make one-sixteenth of an inch, or thereabout, in depth. Going through one of the arms and the bore of the pivot and screwed into the other arm is a headed screw, F, such screw serving to hold the arms and pivot in connection and to prevent the arms from spreading apart.

In the place of the connection-screw F, a rivet in some cases may be used, in which case it would go through both the arms and the pivot and be upset at its end or ends; but the screw is preferable to such rivet. Prior to the introduction of the pivot between the arms such arms are to be s irun asunder sufficiently for such introduction, after which they are to be allowed to close, or are to be closed, upon the pivot in a manner to cause its projections d to enter the recesses c in the said arms and to fit closely to the ends of the pivot. cylindrical, pins 6 6 should be driven into the pivot and arms, to prevent the pivot from revolving, so as to get its cartridge-retractor operative cam f out of place.

From the above it will be seen that the projections at the ends of the pivot and the recesses in the arms for reception of such projections completely relieve the screw'F from strain brought on the pivot during discharge of the piece.

I am aware that to prevent from turning in its ears or supports the tubular collar of the pintle of the barrel of abreech-loader has been made with two studs, to extend from one end of it into a recess or recesses formed in one of such ears, and therefore I make no claim to such, as it diifers materially from my inven tion, in which the tubular pivot, through which and the arms the fastening-pin extends, has projections from opposite ends of it, to enter recesses in the two arm's.

I claim in a breech-loading fire-arn1-- 1. The combination of the stationary breech,

In case of the said projections being locking projection, as described, the two arms extending from such breech and recessed, and having a connection rivet or screw, as explained, and the tubular pivot arranged between such arms, and provided with end pro- 5 jections to enter their recesses, all being substantially as represented. 2. The combination of the pivot-sustaining arms of the breech, having in them a connection rivet or screw and cylindrical recesses, as

explained, with the tubular and cylindrical 10' pivot arranged on the said rivet or screw, and having end projections to enter the said recesses, and with pins extending into the pivot andarms,a11being substantiallyasrepresented.

NATHAN'RUSSELL DAVIS. Witnesses:

B. H. EDDY,

' E. B. PRATT. 

